Hi,
As you know, I'm interested in formalizing the metro stations mapping.
Interchanges are an important part of subways, and there are many
different types of these. For example, sometimes there are two different
stations with different names that are linked by an underground passage.
Or there is a single station on which trains come that go on different
routes.
A few days ago Jerry presented an interesting case that could help me
(and you) understand mapping interchanges: King's Cross St. Pancras
station in London. Here it is on the tube map:
http://not.textual.ru/zverik/2/4/kingscross.png
And here's how it looks as a 3D model (4 megabytes image):
http://leewoodprojects.co.uk/wp-content/uploads/2010/04/2955_tfl_kingsx-map_staff-a1c.jpg
As you can see, it has FOUR platforms: for black, blue, light blue and
ont for three other lines. People spend some minutes getting from one to
another. But is has a single name and from that it is considered a
single station by many.
So, should it be one railway=station + station=subway or four?
Ilya
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